feat: travel_journal theme pack - HTML fixture + golden XML

- Add golden XML template at data/samples/xml/travel_journal.xml
- Register travel_journal in CLI theme mapping
- Add test_travel_journal_theme.py with fixture, golden, generation, and validation tests
- HTML fixture already exists at data/samples/html/travel_journal.html

Closes mergeos-bounties#28

Author: laurentketterle-hub

src/bloggereasy/cli.py

@@ -130,6 +130,7 @@ def demo_cmd(
         "portfolio.html": "portfolio",
         "news_portal.html": "news",
         "dark_dev.html": "dark",
+        "travel_journal.html": "travel",
     }
     for path in samples:
         out = root / f"{path.stem}.xml"

tests/test_travel_journal_theme.py

@@ -0,0 +1,39 @@
+"""Golden XML + HTML fixture validation for travel_journal theme."""
+
+from pathlib import Path
+
+from bloggereasy.integrations.sdk import generate_from_html
+from bloggereasy.theme.validate import validate_theme_file
+
+
+def test_travel_journal_html_fixture_exists() -> None:
+    fixture = Path("data/samples/html/travel_journal.html")
+    assert fixture.exists(), "travel_journal.html fixture missing"
+    html = fixture.read_text(encoding="utf-8")
+    assert "Coastal Escape" in html or "travel" in html.lower()
+    assert "<style>" in html
+
+
+def test_travel_journal_golden_xml_exists() -> None:
+    golden = Path("data/samples/xml/travel_journal.xml")
+    assert golden.exists(), "travel_journal.xml golden missing"
+    xml = golden.read_text(encoding="utf-8")
+    assert "b:skin" in xml
+    assert "Travel Journal" in xml
+    assert "BloggerEasy" in xml
+
+
+def test_travel_journal_generate_valid(tmp_path: Path) -> None:
+    src = Path("data/samples/html/travel_journal.html")
+    out = tmp_path / "travel_journal.xml"
+    result = generate_from_html(src, out, template="travel")
+    assert result["validation"]["ok"] is True
+    xml = out.read_text(encoding="utf-8")
+    assert "b:skin" in xml or "skin" in xml.lower()
+    assert "Blog" in xml
+
+
+def test_travel_journal_golden_validates() -> None:
+    golden = Path("data/samples/xml/travel_journal.xml")
+    v = validate_theme_file(golden)
+    assert v["ok"] is True, f"Golden XML validation failed: {v.get('issues')}"